package com.xnet.generator.utils;

import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.WordUtils;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;

import com.xnet.common.exception.RRException;
import com.xnet.common.utils.DateUtils;
import com.xnet.generator.entity.ColumnEntity;
import com.xnet.generator.entity.GeneratorParamEntity;
import com.xnet.generator.entity.TableEntity;

/**
 * 代码生成器 工具类
 *
 * @author ZhouChenglin
 * @email yczclcn@163.com
 * @url www.chenlintech.com
 * @date 2017年8月29日 上午8:55:05
 */
public class GenUtils {

    public static List<String> getTemplates() {

        List<String> templates = new ArrayList<String>();
        templates.add("template/Entity.java.vm");
        templates.add("template/Mapper.java.vm");
        templates.add("template/Mapper.xml.vm");
        templates.add("template/Manager.java.vm");
        templates.add("template/ManagerImpl.java.vm");
        templates.add("template/Service.java.vm");
        templates.add("template/ServiceImpl.java.vm");
        templates.add("template/Controller.java.vm");
        templates.add("template/list.html.vm");
        templates.add("template/list.js.vm");
        templates.add("template/add.html.vm");
        templates.add("template/add.js.vm");
        templates.add("template/edit.html.vm");
        templates.add("template/edit.js.vm");
        templates.add("template/menu.sql.vm");
        return templates;
    }

    /**
     * 生成代码
     */
    public static void generatorCode(TableEntity table, List<ColumnEntity> columns, GeneratorParamEntity params,
                                     ZipOutputStream zip) {
        // 配置信息
        Configuration config = getConfig();

        String tableName = table.getTableName();
        int prefixIndex = tableName.indexOf("_");
        if(prefixIndex>-1)
        {
            tableName=tableName.substring(prefixIndex+1);
        }
        // 表名转换成Java类名
//        String className = tableToJava(tableName, config.getString("tablePrefix"));// sys_user -> SysUser
        String className =tableName;
        table.setClassName(className);// SysUser
        table.setObjName(StringUtils.uncapitalize(className));// sysUser

        // 列信息
        for (ColumnEntity column : columns) {
            // 列名转换，java属性名及对应方法名
            String columnName =column.getColumnName(); //columnToJava(column.getColumnName());// user_id -> UserId
            column.setFieldName(StringUtils.uncapitalize(columnName));// userId
            column.setMethodName(columnName);// UserId
            // 列数据类型转换
            String fieldType = config.getString(column.getDataType(), "unknowType");
            column.setFieldType(fieldType);
            // 主键判断
            if ("PRI".equals(column.getColumnKey()) && table.getPk() == null) {
                table.setPk(column);
            }
        }
        table.setColumns(columns);

        // 没主键，则第一个字段为主键
        if (table.getPk() == null) {
            table.setPk(table.getColumns().get(0));
        }

        // 设置velocity资源加载器
        Properties prop = new Properties();
        prop.put("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
        Velocity.init(prop);

        // 封装模板数据
        Map<String, Object> map = new HashMap<>();
        map.put("tableName", table.getTableName());
        map.put("comments", table.getTableComment());
        map.put("pk", table.getPk());
        map.put("className", table.getClassName());
        map.put("objName", table.getObjName());
        map.put("functionCode", params.getFunctionCode());
        map.put("requestMapping", params.getRequestMapping());
        map.put("viewPath", params.getViewPath());
        map.put("authKey", urlToAuthKey(params.getRequestMapping()));
        map.put("columns", table.getColumns());
        map.put("package", config.getString("package"));
        map.put("module", params.getModule());
        map.put("author", config.getString("author"));
        map.put("email", config.getString("email"));
        map.put("url", config.getString("url"));
        map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_CHN_PATTERN));
        map.put("areaName",params.getAreaName());//增加区域名称
        VelocityContext context = new VelocityContext(map);

        // 获取模板列表
        List<String> templates = getTemplates();
        for (String template : templates) {
            // 渲染模板
            StringWriter sw = new StringWriter();
            Template tpl = Velocity.getTemplate(template, "UTF-8");
            tpl.merge(context, sw);

            try {
                // 添加到zip
                if ("1".equals(params.getType())) {
                    zip.putNextEntry(new ZipEntry(getFileName(template, table.getClassName(), params.getModule(),
                            params.getFunctionCode(), config.getString("package"))));
                } else {
                    zip.putNextEntry(new ZipEntry(getFileName(template, table.getClassName())));
                }
                IOUtils.write(sw.toString(), zip, "UTF-8");
                IOUtils.closeQuietly(sw);
                zip.closeEntry();
            } catch (IOException e) {
                throw new RRException("渲染模板失败，表名：" + table.getTableName(), e);
            }
        }
    }

    /**
     * 列名转换成Java属性名
     */
    public static String columnToJava(String columnName) {

        return WordUtils.capitalizeFully(columnName, new char[]{'_'}).replace("_", "");
    }

    /**
     * 表名转换成Java类名
     */
    public static String tableToJava(String tableName, String tablePrefix) {

        if (StringUtils.isNotBlank(tablePrefix)) {
            tableName = tableName.replace(tablePrefix, "");
        }
        return columnToJava(tableName);
    }

    /**
     * 权限标识
     *
     * @param url
     * @return
     */
    public static String urlToAuthKey(String url) {

        return url.replace("/", ":");
    }

    /**
     * 获取配置信息
     */
    public static Configuration getConfig() {

        try {
            return new PropertiesConfiguration("generator.properties");
        } catch (ConfigurationException e) {
            throw new RRException("获取配置文件失败，", e);
        }
    }

    /**
     * 获取文件名，不带包名
     *
     * @param template
     * @param className
     * @return
     */
    public static String getFileName(String template, String className) {

        String packagePath = "java" + File.separator;
        if (template.contains("Entity.java.vm")) {
            return packagePath + className + "Entity.java";
        }

        if (template.contains("Mapper.java.vm")) {
            return packagePath + className + "Mapper.java";
        }

        if (template.contains("Mapper.xml.vm")) {
            return packagePath + className + "Mapper.xml";
        }

        if (template.contains("Manager.java.vm")) {
            return packagePath + className + "Manager.java";
        }

        if (template.contains("ManagerImpl.java.vm")) {
            return packagePath + className + "ManagerImpl.java";
        }

        if (template.contains("Service.java.vm")) {
            return packagePath + className + "Service.java";
        }

        if (template.contains("ServiceImpl.java.vm")) {
            return packagePath + className + "ServiceImpl.java";
        }

        if (template.contains("Controller.java.vm")) {
            return packagePath + className + "Controller.java";
        }

        if (template.contains("list.html.vm")) {
            return "view" + File.separator + "list.html";
        }

        if (template.contains("add.html.vm")) {
            return "view" + File.separator + "add.html";
        }

        if (template.contains("edit.html.vm")) {
            return "view" + File.separator + "edit.html";
        }

        if (template.contains("list.js.vm")) {
            return "js" + File.separator + "list.js";
        }

        if (template.contains("add.js.vm")) {
            return "js" + File.separator + "add.js";
        }

        if (template.contains("edit.js.vm")) {
            return "js" + File.separator + "edit.js";
        }

        if (template.contains("menu.sql.vm")) {
            return className.toLowerCase() + "_menu.sql";
        }

        return null;
    }

    /**
     * 获取文件名，带包名
     */
    public static String getFileName(String template, String className, String module, String functionCode,
                                     String packageName) {

        String packagePath = "java" + File.separator;
        if (StringUtils.isNotBlank(packageName)) {
            packagePath += packageName.replace(".", File.separator) + File.separator + module + File.separator;
        }

        if (template.contains("Entity.java.vm")) {
            return packagePath + "entity" + File.separator + className + "Entity.java";
        }

        if (template.contains("Mapper.java.vm")) {
            return packagePath + "dao" + File.separator + className + "Mapper.java";
        }

        if (template.contains("Mapper.xml.vm")) {
            return packagePath + "dao" + File.separator + className + "Mapper.xml";
        }

        if (template.contains("Manager.java.vm")) {
            return packagePath + "manager" + File.separator + className + "Manager.java";
        }

        if (template.contains("ManagerImpl.java.vm")) {
            return packagePath + "manager" + File.separator + "impl" + File.separator + className + "ManagerImpl.java";
        }

        if (template.contains("Service.java.vm")) {
            return packagePath + "service" + File.separator + className + "Service.java";
        }

        if (template.contains("ServiceImpl.java.vm")) {
            return packagePath + "service" + File.separator + "impl" + File.separator + className + "ServiceImpl.java";
        }

        if (template.contains("Controller.java.vm")) {
            return packagePath + "controller" + File.separator + className + "Controller.java";
        }

        if (template.contains("list.html.vm")) {
            return "view" + File.separator + functionCode + File.separator + "list.html";
        }

        if (template.contains("add.html.vm")) {
            return "view" + File.separator + functionCode + File.separator + "add.html";
        }

        if (template.contains("edit.html.vm")) {
            return "view" + File.separator + functionCode + File.separator + "edit.html";
        }

        if (template.contains("list.js.vm")) {
            return "js" + File.separator + functionCode + File.separator + "list.js";
        }

        if (template.contains("add.js.vm")) {
            return "js" + File.separator + functionCode + File.separator + "add.js";
        }

        if (template.contains("edit.js.vm")) {
            return "js" + File.separator + functionCode + File.separator + "edit.js";
        }

        if (template.contains("menu.sql.vm")) {
            return className.toLowerCase() + "_menu.sql";
        }

        return null;
    }

    public static void main(String[] args) {

        System.out.println(StringUtils.uncapitalize("user_id"));
        System.out.println(StringUtils.uncapitalize(columnToJava("user_id")));
    }

}
